Interplay of antiferromagnetic coupling and spin crossover in dinuclear iron(II) complexes

被引：21
|
作者：
Gaspar, AB
Ksenofontov, V
Spiering, H
Reiman, S
Real, JA
Gütlich, P
机构：
[1] Johannes Gutenberg Univ Mainz, Inst Anorgan & Analyt Chem, D-55099 Mainz, Germany
[2] Univ Valencia, Inst Ciencia Mol, Dept Quim Inorgan, E-46100 Burjassot, Spain
来源：
HYPERFINE INTERACTIONS | 2002年 / 144卷 / 01期
关键词：
spin transition; Fe(II) dinuclear complexes; LIESST effect; magnetic field Mossbauer spectroscopy;
D O I：
10.1023/A:1025466009543
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
This article reports on the study of the interplay between magnetic coupling and spin transition in 2,2'-bipyrimidine (bpym)-bridged iron(II) dinuclear compounds. Coexistence of both phenomena has been observed in [Fe(bpym)(NCS)(2)](2)bpym, [Fe(bpym)(NCSe)(2)](2)bpym and [Fe(bt)(NCS)(2)](2)bpym (bpym = 2,2'-bipyrimidine, bt = 2,2'-bithiazoline) by the action of external physical factors namely pressure or electromagnetic radiation. Competition between magnetic exchange and spin crossover has been studied in [Fe(bpym)(NCS)(2)](2)bpym at 6.3 kbar. LIESST experiments carried out in [Fe(bpym)(NCSe)(2)](2)bpym and [Fe(bt)(NCS)(2)](2)bpym at 4.2 K have shown that is possible to achieve dinuclear molecules with different spin states in this class of compounds.
引用
收藏
页码：297 / 306
页数：10
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